Everyone has digestive problems from time to time: an upset stomach, gas, heartburn, constipation or diarrhea. Many problems may be uncomfortable or embarrassing, but they are not serious and don’t last long. Others can be controlled with simple changes in your diet. But sometimes even common symptoms can be signs of a more serious problem.

Your digestive system is made up of the digestive tract—a series of hollow organs joined in a long, twisting tube from the mouth to the anus—and other organs that help your body break down food and process its components (such as carbohydrates, proteins, fats, vitamins, minerals and water) so your body can easily use them. Digestion begins in your mouth, when you chew and swallow, and is completed in the small intestine.

Your primary care doctor can usually help you take care of your digestive health. But when you need further attention, your doctor will refer you to a gastroenterologist, a doctor who specializes in diagnosing and treating disorders of the digestive system. Mercyhealth’s caring gastroenterologists practice in several locations in southern Wisconsin and northern Illinois.

Our gastroenterologists provide comprehensive, patient-centered services for adults and children. View our pediatric gastroenterology services.

We use state-of-the-art technology, including endoscopic ultrasound and high-definition imaging equipment, for diagnostic and therapeutic procedures.

Find a Provider

Providers available for this service:


Services and Treatments

  • Breathe test (for bacterial overgrowth and lactose intolerance)
  • Colonoscopy
  • Endoscopic retrograde cholangio-pancreatography (ERCP)
  • Endoscopy
  • Esophageal manometry with pH
  • Hemorrhoid treatment
  • Video capsule endoscopy

Gastroenterology Conditions

  • Abdominal pain
  • Anal/rectal incontinence
  • Anemia (iron deficiency)
  • Bile duct obstruction
  • Cancers of the digestive system
  • Celiac disease
  • Colon obstruction
  • Colorectal cancer
  • Constipation
  • Crohn’s disease
  • Diarrhea
  • Esophageal obstruction
  • Gastroesophageal reflux disease (GERD)
  • Gastrointestinal bleeding
  • Hemorrhoids
  • Inflammatory bowel disease (IBD)
  • Irritable bowel syndrome (IBS)
  • Small intestine bacterial overgrowth (SIBO)
  • Swallowing problems
  • Ulcerative colitis
  • Ulcers
  • Unexplained weight loss


Mercyhealth Crystal Lake South

415-A Congress Pkwy.
Crystal Lake, IL 60014

Phone: (815) 356-7494

Mercyhealth East

3524 E. Milwaukee St.
Janesville, WI 53546

Phone: (608) 756-7100

Mercyhealth Hospital and Medical Center–Walworth

Hwys. 50 and 67, N2950 State Road 67
Lake Geneva, WI 53147

Phone: (262) 245-0535
Toll-Free (800) 637-2901

Mercyhealth Hospital–Rockton Avenue

2400 N. Rockton Ave.
Rockford, IL 61103

Phone: (815) 971-5000

Mercyhealth McHenry

3922 Mercy Dr.
McHenry, IL 60050

Phone: (815) 344-4499

Mercyhealth Michael Berry Building

1000 Mineral Point Ave.
Janesville, WI 53548

Phone: (608) 756-6588
Toll-Free (888) 816-3729

Mercyhealth Woodstock

2000 Lake Ave.
Woodstock, IL 60098

Phone: (815) 337-7100
Toll-Free (888) 983-7100


Discharge Instructions for Colonoscopies and Endoscopies

Glen Burress, MD – Pediatric Gastroenterology at Mercyhealth

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